ADC-ENERGY-METROLOGY-LIB-SW

The ADC energy metrology library software package implements various metrology parameters for energy measurement typical of electricity meters, power-distribution units (PDUs), and circuit breakers using high-performance, multichannel analog-to-digital converters (ADCs).

The ADC samples the output of channels at up to 8 kHz to measure the current and voltage of each leg of the AC mains. This software library can achieve high accuracy across a wide-input-current range (0.05 A to 100 A) and supports high sampling frequencies necessary for advanced power-quality features, such as individual harmonic analysis. Using an independent ADC to sample the current-sensor output provides designers greater flexibility in the choice of metrology microcontrollers when compared to application-integrated system-on-chip (SoCs) and dedicated application-specific products.

This software includes hardware abstraction layers to enable communication between an ADC and an Arm® Cortex® that can also be ported to other microprocessors using the hardware abstraction layers.

Also included is a Windows® PC GUI to display metrology parameters from the TIDA-010037 and TIDA-010036 reference designs.

The software specifically supports the calculation of various metrology parameters for energy measurement including:

• Total and per-phase active (kWh), reactive (kvarh), and apparent energy (kVAh) with pulse-generation outputs
• Total and per-phase active (kW), reactive (kvar), and apparent power (kVA)
• Total and per-phase fundamental active energy
• Total and per-phase fundamental active power
• Total and per-phase power factor
• Per-phase voltage and current root mean square (RMS)
• Line frequency
• Supply-voltage dips and sags, swells, interruptions, and under and over deviation
• Per-phase voltage total harmonic distortion (THD)
• Per-phase current THD
• Voltage phase-to-phase angle
• Per-phase zero crossing
• Fixed- and floating-point calibration factors